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Type One Energy funding, valuation and investors
Stellarator fusion company developing commercial power plants with industrial partners
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Funding, valuation & investors
Answer-first snapshotLatest funding
Series B
$200M · October 6, 2026
Latest known valuation
Reported $900M pre-money target for the planned Series B
Convertible note · January 14, 2026
Total disclosed equity funding
$370M
Excludes debt, grants, acquisitions, secondaries, and IPO proceeds.
Current status
private
series b · Knoxville, Tennessee, United States
Investors in latest funding
Lead: Breakthrough Energy Ventures , Clutterbuck Capital
Other: Lowercarbon Capital , Siemens Energy Ventures , SiteGround Capital
Overview
Type One Energy develops optimized stellarator fusion systems and a partner-led model for commercial fusion deployment. Its Project Infinity program at the Tennessee Valley Authority's Bull Run site includes an engineering prototype and a planned 400 MWe commercial plant.
Why Type One Energy is interesting
Type One is pursuing one of fusion's most technically demanding designs while using an asset-light integrator model. The approach could reduce capital requirements, but it shifts significant execution risk into supplier coordination, licensing and first-of-a-kind project finance.
Product & use cases
Type One Energy's FusionDirect program combines optimized stellarator physics, high-field superconducting magnets, computational engineering and external industrial partners. Infinity One is the engineering prototype; Infinity Two is planned as a 400 MWe commercial plant at TVA's Bull Run site.
- Utility-scale clean baseload generation
- Commercial stellarator design and integration
- Fusion plant technology licensing
- Industrial partnerships for first-of-a-kind plants
Key facts
- Completed a $200 million Series B in October 2026
- Received Tennessee's initial operating license for Project Infinity
- Plans a 400 MWe Infinity Two commercial plant at TVA's Bull Run site
Funding history (newest first)
Series B
2026-10-06 $200M- Breakthrough Energy Ventures (lead)
- Clutterbuck Capital (lead)
- Lowercarbon Capital (participant)
- Siemens Energy Ventures (participant)
- SiteGround Capital (participant)
Source: https://typeoneenergy.com/insights-announcements/type-one-energy-completes-200m-series-b-financing/
Convertible note
2026-01-14 $87M Valuation: Reported $900M pre-money target for the planned Series B- Undisclosed investors
Seed extension
2024-07-30 $53.5M- Breakthrough Energy Ventures (participant)
- TDK Ventures (participant)
- Doral Energy-Tech Ventures (participant)
Seed
2023-03-28 $29M- Breakthrough Energy Ventures (lead)
- TDK Ventures (lead)
- Doral Energy-Tech Ventures (lead)
Source: https://techcrunch.com/2023/03/28/fusion-startup-type-one-fundraising/
Investors in our directory
Funds linked from Type One Energy's profile — open a fund page for stage focus and related deal articles.
Competitive landscape
Edge: A team rooted in decades of stellarator research, access to high-temperature superconducting magnet technology and partnerships with TVA, AECOM and industrial suppliers. Stellarators can offer steady-state plasma operation without the pulsed current central to tokamaks.
Type One competes with Commonwealth Fusion Systems, Helion, TAE Technologies, Pacific Fusion, Proxima Fusion and public research programs. Its partner-heavy model requires less internal manufacturing than vertically integrated rivals, but gives the company less direct control over quality, schedule and cost.
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Commonwealth Fusion Systems direct
Tokamak developer pursuing commercial ARC plants and supplying magnet technology used by Type One.
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Proxima Fusion direct
European stellarator company pursuing a simulation-led commercial design.
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Helion Energy direct
Pulsed fusion developer targeting direct electricity generation.
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TAE Technologies direct
Advanced-beam fusion developer with a long private-capital history.
Notable stories
- Type One says its Series B can advance Project Infinity roughly halfway to groundbreaking, while at least one additional financing may still be required.
Industries
Market / IPO context
Editorial / static context — not a live quote.
Related funding articles
Venture Capital Tracker pieces that cover Type One Energy's financing or category context.
FAQs about Type One Energy
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